CN1863687A

CN1863687A - Method and device for the production of a component, especially a hybrid component for a crossrail of a vehicle, component and use of said component

Info

Publication number: CN1863687A
Application number: CNA200480029552XA
Authority: CN
Inventors: 瓦尔特·沃尔夫
Original assignee: Behr GmbH and Co KG
Current assignee: Mahle Behr GmbH and Co KG
Priority date: 2003-10-08
Filing date: 2004-10-08
Publication date: 2006-11-15
Anticipated expiration: 2024-10-08
Also published as: DE102004049393A1; ATE452813T1; US20070052262A1; JP2007509789A; WO2005032917A1; EP1682401A1; EP1682401B1; CN100475584C; DE502004010558D1; CN100457488C; CN1863686A

Abstract

The invention relates to a structural element (1), particularly a hybrid structural element for a cross member of a vehicle, in which a base body (2) is provided, which is at least partially lined with plastic (4) and which is provided with at least one flow tap (8a to 8e). Said base body (2) is, in the area of flow tap (8a to 8e), provided with a flow-guiding means (9).

Description

Component, in particular hybrid component for a vehicle transverse member, and use thereof

Technical Field

The invention relates to a component, in particular a hybrid component for a vehicle transverse member. The invention also relates to the use of such a component.

Background

In the automobile industry, it is known to produce metal cross members from tubes with a corresponding wall thickness. The respective wall thicknesses used provide the cross member with sufficient shape stability, bending, longitudinal and torsional stiffness and sufficient resistance to pressure loading. The cross-member formed by a tube or a hollow structure can in principle be used for air transport, for example from an air conditioning unit located centrally in the front end of the vehicle to the side outlet.

Such a cross-beam is known, for example, from DE 10064522 a 1. In order to reduce weight, the cross member is made of a lightweight material, in particular a lightweight metal, as a shell component or body, in which a plastic core forming at least one pipe is arranged in order to ensure sufficient rigidity and resistance to pressure loading. In order to let the air out, the duct is provided with an opening as an air outlet.

The fluid is usually guided, in particular deflected, at the air outlets by a guide element arranged outside the component. The flow medium, such as air, flows to the guide element through a single large opening in the component body or several openings in the form of perforations in the region of the opening. Thus, in the air outlet area, the air outlet at the edge of the outlet on the body is sharp, so that irregular fluid flow can be caused.

Disclosure of Invention

The object of the invention is to provide a particularly simple component, by means of which particularly uniform air discharge can be achieved. In addition, the invention also provides the application range of the component.

The object of the invention is achieved by a component having the features of claim 1. The characterizing features of the independent claims 27 to 30 give a range of applications of such a component.

The dependent claims relate to advantageous embodiments of the invention.

The invention proceeds from the following assumptions: a component, such as a hybrid component for a motor vehicle transverse member, is formed by a body which is at least partially covered with plastic and has at least one fluid outlet, through which a medium, such as a gas, flowing in the component can exit uniformly. For this purpose, the component should ensure that the flow guidance at the fluid outlet should be as gradual as possible. A flow guide is therefore provided within the component itself, in particular in the region of the fluid outlet. By arranging a flow guide in the region of the fluid outlet, a uniform and stable outflow of gas through the door opening in the component can be ensured. When the component is used as an air duct in an automobile air conditioning device, air flows out uniformly and smoothly, so that the comfort level of the automobile air conditioner is improved.

A component, in particular a hybrid component, for a vehicle transverse member, has a body which is at least partially covered with plastic and which is formed from at least two elements which can be connected to one another, wherein the plastic is applied to the inner wall of the body in order to provide a flow guide in the area of the fluid outlet. The plastic is in particular in the form of a plastic structure, which is arranged in the body, for example by injection molding, joining and/or embedding. Here, the cross-section of the plastic structure is smaller than the cross-section of the body. It is advantageous if the body which is partially covered with plastic is perforated at least in partial regions, for example in the region of the opening. Such a body has the advantage of reducing weight and/or strengthening the structure.

According to the object of the invention, the flow guide is a smoothing element. In a particularly simple embodiment, the flow guide means, in particular the smoothing element, is formed by a plastic structure with different thicknesses. In other words: since the plastic coating or plastic structure of the fluid outlet area has different thicknesses, the smoothing element can be formed from the plastic itself on the body. The thickness of the plastic structure here is 1mm to 10mm, preferably 2mm to 6 mm. In addition, at least a portion of the plastic structure may be multi-layered, particularly a hard-soft layer combination, to improve sound damping.

In one possible embodiment of the smoothing element, the plastic structure is formed by an arched thickening in the fluid outlet. By means of this curvature in the fluid outlet area, in particular in the fluid outlet area, a gentle flow guidance can be achieved.

Alternatively or additionally, the flow guide is formed by a baffle element. This ensures as gentle a flow as possible and also a deflection, for example of the fluid to the outlet opening. In one embodiment, the baffle elements extend from the plastic layer on the inner wall into the hollow space of the body in an arcuate, in particular tongue-shaped manner, so that a large part of the baffle elements extends perpendicularly to the flow direction, i.e. upwards or downwards, and thus acts as a baffle. Alternatively, the baffle elements may extend vertically, viewed in the longitudinal direction of the body, and then laterally in an arc, so that the baffle elements extend perpendicularly to the direction of the fluid flow, in particular laterally, and thus serve to divert the fluid flow laterally. According to one embodiment, the baffle elements can be attached to the plastic layer as separate modules; on the other hand, the plastic layer and the baffle element can be formed as a module, in particular a plastic module in the form of a plastic structure.

According to the embodiment of the component, in particular of its body, for example in the case of a multi-chamber pipe for the supply of a plurality of flowing media, a plurality of parallel baffle elements can be arranged side by side in the body, in particular in the fluid outlet region, as viewed in the longitudinal direction. In this embodiment, the baffle elements form partitions between the chambers of the pipe.

Alternatively or additionally, the flow guide is formed by a guide and reinforcement element. In this way, in addition to a gentle guidance and possible deflection of the fluid, the body can be sufficiently reinforced, in particular with sufficient torsional, bending and longitudinal bending stiffness. The combined guide and reinforcement element is formed by a pipe element, a baffle element arranged in the pipe element and at least one reinforcement element which is supported by the pipe element and bears against the body. In this case, the cross-section of the pipe element, viewed in the direction of the fluid outlet, is tapered, while the reinforcement element is arranged in the form of a cross-rib in the cavity between the pipe element and the body. The cross-fins may be perpendicular to the conduit or may form an oblique angle of 0 to +/-60 with the conduit. That is, the ribs are parallel to each other or form an angle of at most 120 °, preferably 90 ° or 0 °.

According to one embodiment of the combined guide and reinforcement element, the baffle element extends in an arc from the pipe element and closes the pipe element in a fluid outlet region at the end of the combined guide and reinforcement element and projects into the outflow opening of the body. So that no abutting edge is formed facing the flowing medium.

According to the method for producing the component, the flow-guiding means are at least partially or completely separately formed and can be embedded in the body. Alternatively, the flow-guiding means can be formed in one step with the plastic coating of the body by a so-called one-component or multi-component injection molding process into the plastic structure. Simple switch dies may preferably be used in the formation of these elements.

Preferably, several flow guides, in particular a smoothing element, a deflecting element and/or a guiding and reinforcing element are arranged in a fluid outlet. Viewed in the longitudinal direction, the body is provided with a plurality of fluid outlets spaced apart from one another. In this way, in a motor vehicle, air can be supplied to a plurality of regions in the interior of the motor vehicle, such as the front windows, side windows, the front region and/or the foot region. Alternatively or additionally, fluid outlets may be provided on the body, which are arranged opposite each other in the transverse direction. In this way, the medium can flow out upwards and/or downwards, depending on the arrangement of the components. In a component consisting of two shell parts, the fluid outlet is arranged across the shell parts, i.e. at the interface between the two shell parts, and/or at each shell part.

In order to provide the component with a support structure which is as good as possible, the body is covered at least partially, in particular along its longitudinal extension, with plastic, for example by injection molding. Alternatively or additionally, the plastic may be pre-formed and then embedded into the body. The body is preferably covered with plastic on the inside and/or outside. The plastic is also preferably single-or multi-layered and/or has different thicknesses in certain places. In order to provide the component with the best possible flexural, warp and torsional rigidity, the plastic is preferably inserted with a form fit and with a flat fit. In a plastic structure forming a pipe through which a gaseous or liquid medium flows, the plastic layer has thermal and acoustic insulation effects in addition to good structural rigidity. The plastic layer can also be provided with a reinforcement, for example by a reinforcing fabric, fibers, balls or other material. To improve the thermal and acoustic insulation, the plastic layer may be foamed. Here, the PU foam, the rigid foam or the flexible foam, the integral foam are foam-molded by physical or chemical methods (TSG thermoplastic foam injection molding, Mucell method, etc.) or have a multilayer structure in which the thickness of each layer is different.

A body made of metal and/or light metal, such as aluminum, magnesium, titanium or high-grade steel, with a wall thickness of 0.4mm to 1.5mm, preferably to 2.0mm, or depending on the material strength, up to 3.0mm, is preferably used here. Depending on the type and function of the component, part regions of the body may have different wall thicknesses. For example, when the component is a transverse member, the wall thickness of the region of its fastening and force-transmitting points in the motor vehicle, the region of connection to the a-pillar, the steering region, the region of connection to the air conditioning system or the region of the longitudinal beams, engine mount or hood hooks in the so-called front module is greater than the wall thickness of the region of the component which serves merely as a wind pipe, mounting bracket or other function. Such sheets used as bodies are "tailor-made sheets" (parts of the area being welded together), "tailor-made rolled sheets" (rolled with different thickness in the rolling direction), "profiled strips" (e.g. thick at the edges, thin at the centre) or "repair sheets" (like a puzzle, but connected to form a slab from parts of different thickness). Such a metal body or plate is of low cost and is suitable for use in light structures designed for weight reduction in the automotive industry.

The above-described component is preferably used for instrument panel supports in motor vehicles, wherein the plastic core or the plastic structure forms one or more ducts, in particular air ducts and/or cable ducts. Such a component can also be used as a cross-member in a motor vehicle, in particular between the a-pillars of a motor vehicle.

The invention has the advantage that the flow medium can be discharged gently by the guide mechanism arranged in the fluid outlet area, so that the air conditioning comfort of the air outlet area is improved. Similarly, in other areas of the flow guide, the wind guide function is separated from the static function of the body when needed. Thus, the deflection is more moderate and the deflection amount is larger.

Drawings

The invention is explained in detail below with reference to the figures and examples. Wherein,

in fig. 1 an embodiment of a component is shown, in which a half of the component is shown, with a fluid outlet and flow directing means arranged therein,

figure 2 shows another embodiment of the flow guide mechanism,

fig. 3A to 3C are perspective views of components, in which there is a body at least partially covered with plastic and a number of fluid outlets and flow directing means,

figures 4 to 6 show different embodiments of the element, in particular a half of the element, with a fluid outlet and flow guide means arranged therein,

FIG. 7 is a perspective view of a closed member with a fluid outlet and flow directing mechanism disposed therein,

fig. 8 is a cross-sectional view of a component with a fluid outlet and flow directing means disposed therein.

Like parts are designated with like reference numerals throughout the several views.

Detailed Description

Fig. 1 is a top view of an element E of a component 1, such as a cross-member, arranged between a-pillars (not shown) of a motor vehicle.

The component 1 is here formed of at least two elements E, shown in fig. 1 as a lower element E, such as a half body or a half shell. An upper element, not shown in the figures, corresponds to the lower element and is also a half-body or a half-shell. The component 1 has a body 2 which is preferably made of sheet metal, in particular of light sheet metal such as aluminum or magnesium or high-grade steel. In the embodiment, the body 2 is in the closed condition, that is to say the two elements E are joined together to form a hollow structure, in particular a tubular hollow structure. The body 2 may also be a hollow structure with a box-shaped cross section and/or be perforated at least in some areas. In an embodiment with a box-shaped cross section, the body 2 is formed by two elements E, for example a U-shaped steel or a lower housing and a cover.

The body 2 may alternatively be of a hollow construction with a box-shaped cross-section and/or be perforated at least in regions.

The body 2 is provided on the inside with plastic 4, which forms a plastic structure K. The plastic 4 can be shaped in the form of a plastic coating by means of joining, embedding or injection. The body 2, which is at least partly covered with plastic 4, serves in the closed state as a conduit 6, in particular as a flow channel and/or guide conduit for transporting fluids or for guiding cables or other components.

In order to maximize the use of the duct 6 formed by the plastic structure K for conveying media such as air for air conditioning the interior of the vehicle cabin or for guiding wires or cables, the two elements E should be firmly connected to each other at the edge R. In this case, the edge R forms the interface between the two elements E. For this purpose, the elements E form a mechanical and/or material-bonded connection at the mutually overlapping edges R when the body 2 is in the closed state. The body 2 can be firmly connected by riveting, bolting, welding, gluing, crimping, caulking or the like at the mutually overlapping edges R between the elements E. In addition, the body 2, and in particular the openings (not shown) of its two elements E at the edge R, for example projections, are fixed together by the plastic 4. The plastic 4 is attached to the body 2 and is connected to the body 2 by thermoplastic methods by its own properties.

The plastic structure K formed by the plastic 4 increases the rigidity of the body 2 in the form of a plastic covering. The particularly thin-walled body 2 produces noise when air flows through it, while the covering of the body 2 formed by the plastic 4 has the advantage of damping noise, i.e. the plastic 4 acts as a sound insulation and also as a heat insulation.

For the medium flowing in the pipe 6 and out into the vehicle cabin, the body 2 has at least one fluid outlet 8a to 8 c. Three fluid outlets 8a to 8c are shown in figure 1. In the region of the respective fluid outlet 8a to 8c, a flow guide 9 is provided for the smooth outflow of the medium. The flow guide means shown in fig. 1 are formed by a flow smoothing element 11, wherein the plastic structure K has a different thickness in the region of the respective fluid outlet 8a or 8b, so that a gentle or steep flow guide is obtained. In other words, the thickness of the plastic structure K or the thickness of the plastic 4 is adapted to the defined flow profile in the region of the associated fluid outlet 8a to 8c depending on the location. The thickness of the plastic structure K is 0.1mm to 10mm, preferably 2mm to 6 mm. The plastic structure K may be a multilayer structure in partial regions. Depending on the flow pattern in the region of the respective fluid outlet 8a or 8b, 8c, i.e. a gentle or abrupt flow guide, the associated plastic structure K has an arched thickening with a greater thickness of 4mm to 6mm or a flattened or slightly spheroidized thickening with a lesser thickness of 2mm to 4 mm. Instead of thickening or thinning, radii of different sizes may be used in the region of each fluid outlet 8a to 8 c.

Alternatively or additionally, as shown in fig. 2, at least one baffle element 10 can be arranged as a further fluid guide 9 in the region of each fluid outlet 8 a. Depending on the type and design of the baffle element 10, it can be formed as a separate plastic module and connected to the plastic structure K. The baffle elements 10 can also be formed in one piece with the plastic structure K or plastic layer by so-called single-component or multi-component injection molding. As shown in fig. 2, a plurality of baffle elements 10 are arranged parallel to one another, viewed in the longitudinal direction of the component 1, and each of them projects into a respective fluid opening 8a and into an opening O of the body 2. In order to deflect the medium flowing in the longitudinal direction in the pipe 6, the deflecting element 10 is curved, so that the medium can be deflected in the direction of the opening O and can flow out of the latter. Furthermore, the plastic structure K has a slightly arched thickened region (i.e. the smoothing element 11) in the region of the fluid outlet 8a, by means of which the medium flows out of the opening O gently. The outermost baffle elements 10 can simultaneously close off the ends of the pipe.

In addition, the baffle elements 10 are arranged vertically in the body 2, i.e. in each element E, so that the baffle elements 10 are partition walls dividing the duct 6 into several chambers. This embodiment can be used, for example, in a duct 6 formed in the form of a multi-chamber duct, in which various media, such as fresh air, cold air and/or hot air, flow. These different media can be mixed together at the outflow. Different chambers may also lead to different outlets. The upper element E of the body 2 is then shaped accordingly as shown in figures 3A to 3C.

The member 1 in fig. 3A and 3B is in an open state, wherein in fig. 3A the upper element E of the member 1 and the plastic structure K attached, embedded or injected inside the upper element E, and in fig. 3B the corresponding lower element E and the plastic structure K inside. The component 1 of fig. 3C is in the closed state with 6 fluid outlets 8a to 8f, wherein baffle elements 10 for deflecting the fluid are arranged in the fluid outlets 8a and 8 d. As shown in fig. 3A and 3B, the baffle elements 10 extend from the inner wall of the plastic layer or plastic structure K into the cavity of the body 2, in particular into the duct 6, in an arc shape, in particular in a tongue shape. In this way, the pipe 6 is closed at the end, and the medium is deflected by the deflecting element 10 in the direction of the opening O. As shown, fluid outlets 8a to 8f are arranged on each housing half, respectively. Alternatively or additionally, they can also be arranged across the housing at the interface of the two elements E.

The body 2 is of a hollow cylindrical structure and is composed of two half-shell-shaped elements E. The two half-shell elements E form a circular transverse end face with an extension forming an edge R for mechanical and/or material-bonded connection. In a manner not shown in the figures, the component 1 can also have a box-shaped cross section or almost any other form of cross section. Furthermore, the elements E can be indirectly connected together by the plastic 4 itself.

Depending on the type and construction of the component 1, the individual elements E and the respectively associated plastic structures K form individual preforms. For this purpose, the plastic 4 is injected, embedded or bonded into the shell-shaped region of the respective element E, so that the body 2 is at least partially covered with a plastic layer in the form of a plastic structure K, in this case in particular a plastic layer formed by injection or foaming. The plastic 4 is introduced into the forming and joining tool through at least one not shown tube at a defined injection pressure in order to form a coating on one or both sides and all or part of the body 2, for example by injection molding, in particular by single-component or multi-component injection molding, on one or both sides or all of the component 1. Depending on the type of plastic 4, foaming, pouring or the like can also be used.

Independently of the type or method of forming the cover layer, injection or joining, the plastic layer or plastic 4 has a thickness of 0.1mm to 10mm, preferably 0.8mm to 6mm, as specified. The body 2 may be provided with a plastic layer 4 on the inside and/or outside. In addition, the plastic can be applied to the body 2 in a single-layer or multi-layer structure and molded in several stages. Subsequently, the components E of the metal body 2, which are prefabricated and have the plastic structure K, are assembled to form the component 1 according to fig. 3C.

In order to make the component 1 as light as possible and thus particularly easy to form, the metal body 2 is preferably made of a light metal, such as aluminum or magnesium or a high-grade steel, with a wall thickness of 0.4mm to 2.0mm or to 3.0 mm. The body 2 preferably has different thicknesses in partial regions, so that further components, such as a deflection mechanism, an air conditioning system, an air inlet or an air outlet, can be integrated into partial regions of the component 1.

Fig. 4 to 6 are each a plan view of an element E, for example a lower or upper element of the component 1, in which a guide and reinforcing combination element 12 is arranged in the region of the fluid outlet 8g as a fluid guide 9. The combined guide and reinforcement element 12 is formed here by a duct element 14, for example an air duct, a baffle element 10 arranged in the duct element 14, and at least one reinforcement element 16 which is supported by the duct element 14 and bears against the body 2. For this purpose, the plastic structure K forms a flow structure and a guide or guide structure and accordingly has a guide shape in combination with a reinforcing element in the form of an internal rib.

The duct element 14 here has a tapering cross section, viewed in the direction of the associated fluid outlet 8 g. The baffle member 10 extends from the conduit member 14. According to the embodiment of the fluid outlet 8g as a single-channel or multi-channel, and as shown in fig. 5, the baffle element 10 closes the end of the pipe 6 in the case of a single-channel fluid outlet 8g and projects into the opening O of the component 1. Whereas in fig. 4 and 6 the fluid outlet 8g is a multi-channel, in which case the baffle element 10 divides the opening O into two outflow ducts in the form of partition walls.

The reinforcement element 16 is arranged in the cavity H between the pipe element 14 and the body 2 in the form of a cross-fin. The cross fins are perpendicular to the conduit 6 or form an oblique angle of 0 deg. to +/-60 deg. with the conduit. That is to say, the ribs are parallel to one another or form an angle of at most 120 °, preferably 90 ° or 0 °. The body 2 with such a plastic structure K can be formed with particularly good form rigidity and form structure, so that, when the wall of the body 2 is thin, the correspondingly formed plastic structure K can provide sufficient form strength and buckling strength.

In fig. 4 and 5, a semi-open pipe element 14 is shown, while the other element E, which corresponds to the element E associated with it in the component 1, likewise carries a semi-open pipe element 14. When the elements E are butted against each other and the member 1 is in the closed state, the pipe elements form a pipe 6, i.e. a flow channel. In fig. 6 is a guiding and stiffening combination element 12 with a closed pipe element 14. The guiding and reinforcing elements 12 are here either prefabricated as separate modules and then embedded or attached to the metal body 2, or their respective halves are inserted into the body 2.

Fig. 7 shows a further embodiment of a fluid outlet 8h with a plurality of fluid guides 9, a baffle element 10 and a smoothing element 11 (i.e. an arched thickened region of the plastic structure K in the edge region of the opening O). The closing element 18 here closes the duct in the form of a reinforcing rib. The closure element 18 can alternatively be a partition or separating element. In this way, the duct 6 is a multi-chambered duct by means of a separating element extending in the longitudinal direction of the member 1. For this purpose, the separating element must be located in the separating plane or interface of the two half-shells in order to produce the two duct outlets. In this way, the two flow media flow at the fluid outlet 8e by means of the baffle element 10 to the opening O, where they can be mixed together. In the case of a single-chamber duct, the deflecting elements 10 act as guiding and guiding elements, so that, after deflection, a distribution of the air volume and the velocity in the cross section which is as uniform as possible can be produced. Without the baffle elements 10, the flow in the outer region would be higher than proportional, while on the inner side a backflow would occur.

Fig. 8 shows a cross-sectional view of a possible embodiment of the component 1, in the region of one of the fluid outlets 8a to 8h, in which a baffle element 10 is arranged.

The component 1 can be used as a dashboard support for air conditioners and/or heating installations. The component 1 can also be used as a cross member arranged in a motor vehicle under a windshield and as an air duct for air conditioning and defrosting of the windshield or front window in the vehicle cabin. Viewed in the longitudinal direction, the body 2 is provided with a plurality of fluid outlets 8a to 8h at a distance from one another and openings O as inlets and/or outlets for the medium, such as air, flowing in the duct 6. Of course, the number and arrangement of the inlets and outlets may be varied at will. In addition, the inlet or outlet can also be arranged in the region of the edge R, on one housing or across two housings of the body 2.

In addition, such a component 1 can also be used in other locations in a motor vehicle. Such as an a-pillar, B-pillar, C-pillar, D-pillar, a side rail, an automobile threshold, a roof rail, and the like. This component also makes it possible to save space in terms of the transport and distribution of air in an air conditioning system (abbreviated to HVAC), in which the component 1 is used as a structural element, in particular a hollow structural element, of a motor vehicle.

Description of the reference symbols

1 component 2 body

4 plastic 6 pipeline

8a to 8h fluid outlet 9 fluid guide mechanism

10 baffle element 11 advection element

2 guiding and reinforcing combined element 14 pipe element

16 stiffening element 18 separating element

E element H cavity

K plastic structure O opening

R edge

Claims

1. A component (1) comprising a hybrid component for a vehicle transverse member, characterized in that it has a body (2) which is at least partially coated with plastic (4) and which has at least one fluid outlet (8a to 8e), wherein the body (2) has a flow guide (9) in the region of the fluid outlet (8a to 8 e).

2. A structure as claimed in claim 1, characterized in that the flow-guiding means (9) is a smoothing element (11).

3. Component according to claim 1 or 2, characterized in that the flow-guiding means (9), in particular the flow-smoothing element (11), is formed by a plastic structure (K) having different thicknesses.

4. A structure as claimed in claim 3, characterized in that the thickness of the plastic structure (K) is 0.1mm to 10 mm.

5. A structure as claimed in claim 3 or 4, characterized in that at least a part of the plastic structure (K) is multi-layered and composed of a combination of soft and hard layers.

6. A structure as claimed in any one of claims 3 to 5, characterized in that the advection element (11) is formed by an arched thickening of the plastic structure (K).

7. A structure as claimed in any one of claims 1 to 6, characterized in that the flow-guiding means (9) are constituted by a baffle element (10).

8. A structure as claimed in any one of claims 1 to 7, characterized in that the baffle elements (10) extend arcuately from the plastic layer on the inner wall into the cavity of the body (2).

9. A structure as claimed in any one of claims 7 to 8, characterized in that the baffle elements (10) are formed separately and are joined to the plastic layer.

10. A structure as claimed in any one of claims 7 to 9, characterized in that the baffle elements (10) are integrated with a plastic covering layer.

11. A structure according to any one of claims 7 to 10, characterized in that several baffle elements (10) are arranged parallel to each other side by side, seen in longitudinal direction.

12. A structure according to any one of claims 1 to 11, characterized in that the flow guide means (9) is a guide and reinforcement combination element (12).

13. A structure as claimed in claim 12, characterized in that the combined guiding and reinforcing element (12) is formed by a duct element (14), a baffle element (10) arranged in the duct element (14) and at least one reinforcing element (16) supported by the duct element (14) and bearing against the body (2).

14. A structure as claimed in claim 12 or 13, characterized in that the cross-section of the duct element (14) is gradually reduced, seen in the direction of the fluid outlet (8a to 8 e).

15. A structure as claimed in any one of claims 12 to 14, characterized in that the baffle element (10) extends in an arc from the duct element (14) and closes it in the region of the fluid outlets (8a to 8e) at the end of the guiding and reinforcing composite element (12) and projects into an opening (O) of the body (2).

16. A structure as claimed in any one of claims 12 to 15, characterized in that a plurality of reinforcement elements (16) are arranged in the form of cross-fins in the cavity (H) formed between the duct element (14) and the body (2).

17. A structure as claimed in claim 16, characterized in that the cross-fins are perpendicular to the conduit (6) or form an oblique angle of 0 ° to +/-60 ° with the conduit.

18. A component according to any one of claims 1 to 17, characterized in that the flow guide means (9) are at least partially or entirely separately formed and can be embedded in the body (2).

19. A structure according to any one of claims 1 to 18, characterized in that a plurality of flow-guiding means (9), including advection elements (11), deflection elements (10) and/or flow-guiding and reinforcing combination elements (12), are arranged in each fluid outlet (8a to 8 e).

20. A component according to any one of claims 1 to 19, characterized in that the flow-guiding means (9) in the region of the fluid outlets (8a to 8e) project into the opening (O) of the body (2).

21. A member according to any one of claims 1-20, characterized in that the body (2) is provided with a number of fluid outlets (8 a-8 e) at a distance from each other, seen in the longitudinal direction.

22. A member according to any one of claims 1 to 21, characterized in that the body (2) is provided with opposite fluid outlets (8a to 8e) as seen in the transverse direction.

23. A member according to any one of claims 1 to 22, characterized in that the body (2) is provided at least in part with a plastic layer formed by injection moulding or foaming.

24. A component according to any one of claims 1 to 23, characterized in that the body (2) is made of a metal, light metal or an alloy thereof, selected from aluminium, magnesium, titanium or high-grade steel, and has a wall thickness of between 0.4mm and 2.0 mm.

25. A component according to any one of claims 1 to 24, characterised in that the body (2) has a variable wall thickness in a partial region.

26. A component according to any one of claims 1 to 25, characterized in that the body (2) is covered in partial areas with a physically or chemically foamed material and the wall thickness of the covering layer is variable.

27. Component (1) according to one of claims 1 to 26, for an instrument panel support in a motor vehicle, with a duct (6) comprising an air conveying duct and/or a cable duct.

28. Component (1) according to any one of claims 1 to 26, for a cross-beam in a motor vehicle, which cross-beam comprises a cross-beam or a front end component between the a-pillars of the motor vehicle.

29. Component (1) according to one of claims 1 to 26 for use as a structural element in a motor vehicle, which element comprises a hollow structural element as a cross member, a rocker, a central duct structure, a front end rail or cross member, a vertical structural member, an a-pillar, a B-pillar, a C-pillar, a D-pillar or a roof structural member.

30. Component (1) according to one of claims 1 to 26 for use as a structural element in a motor vehicle, which element comprises a hollow structural element through which air in a heating, cooling, air conditioning or ventilation device flows.